Geus, Armin
T.F.H. Publisher, 1995
Buku Teks
Gage, John D.
Cambridge University Press, 1992
Buku Teks
Tanaka, Yoshifumi
Cambridge University Press, 2012
Buku Teks
Devaux, Bernard
Barron's Educational Series, 2000
Buku Referensi
Bowett, D.W. (Derek William)
Manchester University Press, 1967
Buku Teks